Airbag control unit with part number 89170-BZ410

What does the airbag control unit 89170-BZ410 do?

The airbag control unit 89170-BZ410 is the central control unit of the restraint system for Toyota. It evaluates the crash sensors, decides in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

This decision is made within milliseconds, and the electronics check the components involved while the vehicle is in operation.

Faults are shown by the airbag warning light. After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-BZ410 fail?

With the 89170-BZ410, the most common cause is crash data from an accident, even if no airbag has deployed. Aged components, cold solder joints, moisture at plug connections and voltage spikes may also be causes.

A normal diagnostic tool does not delete the crash data. The other causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 89170-BZ410 is defective?

A defect in the 89170-BZ410 shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Error messages and a disrupted connection to the diagnostic tool also point to a fault.

• airbag warning light on permanently or intermittently
• error message in the instrument cluster
• diagnostic tool gets no connection to the control unit
• fault memory cannot be cleared

With such a defect, airbags and seatbelt pretensioners may not trigger in an emergency. A prompt check is therefore advisable.

Which vehicles is the 89170-BZ410 fitted in?

The control unit 89170-BZ410 is fitted in these vehicles: Toyota Avanza F650 (2011-2015).

The list shows the matching vehicles at a glance:

• Toyota Avanza F650 (2011-2015)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 17952812-928112, 17952815-928143, 89170-BZ440.

How does the repair of the 89170-BZ410 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit and create a repair order online. At Airbag24, checking, repairing and testing usually take 3–4 working days.

For safety reasons the control unit is only removed once reading out and disconnecting the battery are done. Airbag24 finds defective components and repairs them, deletes stored crash data and carries out a function test. Afterwards your own unit is sent back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 89170-BZ410 get to Airbag24?

You send the control unit 89170-BZ410 as a parcel or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Place the printed repair order in the parcel. Pack the unit shock-proof.